Kindle is an electronic device from Amazon, developed by Lab126, which can be used to download e-books, online newspaper versions or magazines. It is thin, lightweight and portable, and it uses wireless internet connectivity to purchase and download content for viewing. The main Kindle line has had three versions since it was released in November 19, 2007.

The first Kindle was named the Kindle First Generation, which retailed for $399. Following the hype, stocks sold out within five and a half hours. It would take months before stocks would come out again for the public. On February 23, 2009, Kindle 2 was made available to the public. This version did not have the previous SD card feature of the Kindle 1, but it was made slimmed than the original version. With its internal memory of 1.4 GB, Amazon estimated that the Kindle 2 can store up to 1500 non-illustrated books. On June 2009, Amazon decided to lower the price of the Kindle 2 to $189, on the heels of Barnes & Noble lowering the price of its similar device, Nook.

The latest version was released July 28, 2010. While the official name is only Kindle, many refer to this model as Kindle 3. Kindle 3 is .5 inch shorter and narrower than its predecessor. The new version also features WiFi and 3G connectivity.

There is also the larger version of Kindle called Kindle DX which was released during Kindle 2’s time. This model features a larger screen, marketed as being the most suitable version for textbooks and newspapers.